MOSCOW BAUMANN STATE TECHNICAL UNIVERSITY
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AIM OF THE WORK

EQUIPMENT

   Spectrometer

   Optical behch design

   Optical resolution

   CCD-detector

   Fibre optic cable

   Collimating lens

   AVALight lamp

   SPECTROMETER CONTROL PARAMETERS

REFERENCE INFORMATION

   Spectral lines

   Argon (Ar I)

   Argon (Ar II)

   Crom (Cr I)

   Iron (Fe I)

   Hydrogen (H I)

   Mercury (Hg I)

EXPERIMENT

   Experiment scheme

   Àcquaintance with control interfaces

   Order of carrying out the work

   Stage 1

   Stage 2

   Stage 3

   Practical part
 
Spectrometer
AvaSpec-2048FT-4-RM Fiber Optic Spectrometer

The AvaSpec-2048 Fiber Optic Spectrometer is based on the AvaBench-75 symmetrical Czerny-Turner design with 2048 pixel CCD Detector Array.

The spectrometer has a fiber optic entrance connector, optical slit, cylindrical collimating lens, for higher sensityviti colli-mating and focusing mirror and diffractional grating.

The spectrometer has a fiber optic entrance connector, optical slit, cylindrical collimating lens, for high sensitivity, focusing mirror, diffraction grating, coating detector.

The AvaSpec-2048 is also available as dual channel or multiple channel instrument (up to 8 channels), where all spectra are taken simultaneously. The AvaSpec-2048 comes with AvaSoft-basic, a complete manual, USB interface cable and a PS-12V/1.0A power supply. AvaSoft-full and application software can be ordered separately. Alternatively the AvaSpec-2048-SPU is available as an option to run on USB power and does not need an additional power supply.

Optical Bench Symmetrical Czerny-Turner,
75 mm focal length
Wavelength range 350-810 nm
Resolution Stray light < 0.1%
Sensitivity
(AvaLight-HAL, 8 mm fiber)
5000 counts/uW -per ms integration time
Detector CCD linear array, 2048 pixels
Signal/Noise 250:1
AD converter 14 bit, 1.33 MHz
Integration time 2 msec - 60 seconds
Interface USB 1.1,12 Mbps
RS 232, 115.200 bps
Sample speed with
on-board averaging
17 msec /scan
Data transfer speed 14-31 ms / scan
Power supply 12 VDC, reverse polarity protection,
160 mA (PS-12V/1.0A)
or 5VDC USB power , 440mA

The AvaSpec 2048 is configured as multichannel instrument with 4 different spectrometer channels, all read out simultaneously, controlled by a master's board microprocessor.

The spectrometer channels cover different wavelength ranges and have different resolution specifications. The multichannel spectrometer run with one USB interface.

  Slot 1 Slot 2
Channel Master Slave1 Slave2 Slave3
Optical Bench Avabench-75 Avabench-75 Avabench-75 Avabench-75
Grating (lines/mm) 3600 2400 1800 1200
Wavelength range, nm 351 - 393 389 - 481 475 - 606 601 - 812
Optical filter - OSF-385 OSF-475 OSF-590
Slit size, mkm 25 25 10 10
Optical Resolution
(FWHM), nm
0,08 - 0,04 0,14 - 0,08 0,11 - 0,07 0,18 - 0,12